Question

Find theta,
4 cos^ theta - 1 = 0​

Answer 1

Answer:

Subtract

1

from both sides of the equation.

4

cos

(

x

)

=

−

1

Divide each term by

4

and simplify.

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cos

(

x

)

=

−

1

4

Take the inverse cosine of both sides of the equation to extract

x

from inside the cosine.

x

=

arccos

(

−

1

4

)

Evaluate

arccos

(

−

1

4

)

.